Improvement in steam-boilers



SAMUEL HARRIS.

Improvement in Steam-Boilers.

No.126,699, PatentedMay14,1872.

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IMPROVEMENT IN STEAM-BOILERS. A

Specification forming part of Letters Patent No. 126,699, dated May 14, '1872.

Specification describing certain Improvements in Steam-Boilers, invented by SAMUEL HARRIS, of Washington, District of Columbia.

My invention consists of an improvement in boilers for generating steam for engines or other purposes.

Figure 1 is a vertical sectional View. Fig. 2 is an end or plan View. Fig. 3 is a sectional viewof casing with the boiler in position.

A is a reservoir of suitable diameter and length, which may be made of wrought or castiron. The reservoir is closed at each end, and is drilled and tapped on its circumference as at G O to receive the projecting tubes B B.

The holes 0 O are drilled spirally or staggered around the reservoir A, so that the tubes B B do not stand over each other. One end of the tubes B B is threaded and screwed into the reservoir A at O G; or they may be fastened to the reservoir by any other suitable means. The outer ends of the tubes B B may be threaded and a cap screwed on them; or they may be plugged or welded up. The holes 0 O are drilled so that the tubes B B are placed or other lining.

slightly inclined. This is for the purpose of allowing the steam free exit from the tubes B B. Usually the water line Will be above the tubes B B; but in case dry or superheated steam is desired the tubes B B will be con tinued above the water line, and will then act as superheaters.

The boiler is placed within a thin wroughtiron casing provided with suitable fire-brick The reservoir A is vertical, and with the lower end just above the fire. The heat passes around and outside the reservoir A and tubes B B. The reservoir A and pipesor tubes B B may be cast in one piece of either cast or malleable iron or other metal.

What I claim as my invention is-- In combination,the vertical reservoir A and projecting tubes B B, closed at the ends, sub

Witnesses:

A. MooRE, D. P. GowL. 

